what visa will I need to come to US for conference?

來源: 於 2009-10-04 09:43:15 [舊帖] [給我悄悄話] 本文已被閱讀：次

What kind of visa can I get to come to US for conference or visiting from Canada, once I transfter green card application to CP? I have a new AP, can I still use that?
Thank you very much!